Rock drill



l April 13, 1943.. J. C. CURTIS mL 2,316,672

Rocx DRILL A Filed June 19. 1941 3 Sheets-Sheet l 2g.' 44 www; 43M

April 13, 1943. J. c. CURTIS Erm.

ROCK DRILL Filed June 19, 1941 3 Sheets-Sheet 2 April 13, 1943. J @Ris Em 2,316,672

ROCK DRILL Filed June 19, 1941 3 Sheets-Sheet 3 o vi Patented Apr. 13,

John C. Curtis and Eimer G. Gartin', Claremont, N. H., assignors to Sullivan Machinery Company, a corporationot Massachusetts Application June 19, 1941, serial No. 398,805 15` claims. (o1. s55-51) This invention relates to rock drills, andmore particularly'to an improved portable rock drill rig embodying adjustable supporting means for a drilling tool for adjusting the latter through a wide'range of drilling positions, and whichanay be readily transported from place to place.

An object of the present invention is to provide an improved portable rock drill rig. Another object is to provide an improved rock drill rig embodying an adjustable supporting element for a drilling tool and having improved adjusting mechanism for the supporting element whereby the drilling tool may be readily adjusted into its diil'erent drilling positions. A further object is 1to provide a novel adjusting means for a rock drill rig whereby the drilling tool may 'be easily moved .into its diilerent positions of adjustment and so held, and embodying improved means whereby the drill may be quickly returned to its initial position. Yet another object is to provide an improved portable rock drill rig which is not only simple in design and lightin weight, but is also extremely durable in construction. A still further object is to provide an Iimproved portable rock drill rig'for a hammer ro'ck drilling tool wherein the drilling tool is supported by a vertically swingable boom structure and having novel swinging means for the boom structure whereby the drilling tool may be supported and adjusted in an improved manner. A further object is to provide improved huid actuated means for elevating the boom structure and holding it in its different adjusted positions. Still anotherob ject is to-provide an improved hydraulically operated boom swinging means and having associated therewith improved connections between the hydraulically operated element and the boom whereby a powerful swinging force may be applied to the boom. AKstill further object is to provide an improved hydraulic operating means having novel valve means embodied therein whereby the boomstructure may not only bev effectively swung upwardly about its pivot but may also be quickly` lowered simply by by.passing the liquid. Yet another object is to provide an improved portable rock drill rig having novel combinations and arrangements of parts. How these and other obj jects are accomplished, and the advantageous features of the invention, will be best understood from the following detailed description wherein a preferred and illustrative4 embodiment is sot forth, reference for the purpose had to the accompsnying drawings, in which:

Fig. 1 is a plan view of a rockdrill rig constructed in accordance with an illustrative embodiment of the invention and showing a drilling tool mounted in drilling position thereon.

Fis. 2 is a side elevational view of the rockdrill l yrig shown in Fig. 1.

Fig. ,3 is a fragmentary side elevational view of a portion of the drilling tool and its guide frame.

Fig. 4 isa fragmentary perspective view illustrating the drill supporting boom and its asso? ciated adjusting means.

Fig. 5 is a detail cross sectional view taken sub stantially on line I-i of Fig..2.

Fig. 6 is a detail cross sectional viewv taken substantially on line 6 8 of Fig. 2.

Fig. 'l is an enlarged detail sectional view showing the hydraulic jack. n v

Figs 8 is a detail sectional view through a portionof the valve means.

Fig. 9 is a detail vertical sectional-view through the pump and liquid tank.

, Fig. 10 is a diagrammatic view showing the drilling tool in an elevated. substantially horizontal drilling position, the vertical drilling position y of the tool being indicated in dotted lines.

Fig. 11 is a diagrammatic view showing the .drilling tool in a position to drill a horizontal hole near the ground level. f

In this illustrative embodiment of the inventionthereisshowna.portabledrillrigforarockv drilling tool, comprising a carriage frame' i supported at one end by a pair oi.' wheels 2 and at the other end by a swivelled caster wheel 3. .'l'he wheels 2 and I preferably have pneumatic tires and directly engage the ground surface. and attached to the caster wheel I is a conventional tow bar 4. The carriage frame has tubular side frame members 5, I united atv one end by a transverse frame 6 and having upstanding side members l. l. The transverse end frame i provides a' vertical bearing l for the swivel frame I of the caster wheel 3. The ds oi' these side frame members I, l of the carriage frame, remote from the transverse end frame l, have secured thereto brackets il having connected thereto axle frames vIi on which the'wheels 2 are journaled. Pivotally connected at l2 to the upper ends of the upstanding side members l, I is a transverse bearing support Il for an elongated boom i4. This .boom is'swingabie in a vertical direction between the side frame members t. l of the` carriage frame and' swivelly supports t its outer end a conventional hammer rock drilling tool, generally desigfnated I5.. This drilling to'ollmay be similar to that disclosed in a copending application of John C. Curtis, Serial No. 321,848, filed February 28, 1940. and comprises an elongated guide frame il erable by-pass Valve 62.

supported by a trunnion support I1 having a swivel plate I8 secured within a saddle member I9, the latter in turn being swivelled at 26 on a right angle portion 2I of the boom. The saddle has conventional clamps for securing the swivel plate to the saddle support and for clamping the saddle support to the boom. An independent feed motor is employed to feed the drilling tool back and forth along the guide frame, in the manner fully described in the copending application above referred to. As the structure of this drilling tool does not per se enter into the present invention, further description thereof is unnecessary.

Now referring to the improved boom swinging structure, it will be noted that guided in longitudinal slots or guideways 22 in vertical plates 23 secured to the side frame members of the carriage frame is a transverse support or crosshead 24. As shown in Fig. 6, thisl support or crosshead comprises a tubular member 25 having xed thereto end members 26, and the crosshead is mounted on supporting rollers 21 received Within .the guideways 22. Extending centrally through the tubular member 25 is a transverse supporting and clamping bolt 28 having a tightening nut 29, and this bolt, when tightened, is adapted to clamp the sliding support in its different adjusted positions along the guideways. The rollers 21 are journaled on the end portions of the bolt 28, and the crosshead is supported by the bolt. Formed integral with the tubular member 25 are projecting arms 30 pivotally connected at 3| to the boom I4. Secured, as by U-bolts 32, to the transverse end frame 6 is a hydraulic double telescopic jack comprising a hydraulic cylinder 33 containing a reciprocable piston 34. The

lhand lever 49, liquid under pressure may be forced into this jack to effect forward sliding movement of the transverse support or crosshead 24 along its guideways 22 relative to the carriage frame, and as a result, the boom I4 is swung upwardly through the arms 30, therebyf to elevate the drilling tool I5. When the liquid is trapped within this hydraulic jack, the boom and drilling tool are held in their adjusted position. When it is desired to lower the drilling tool, that is, to permit downward swinging of the boom, this may be accomplished simply by opening the by-pass valve 62 so that the liquid is by-passed from the hydraulic jack back to the tank 5 I.

The rock drill rig may be towed from one working place to another by the tow bar 4, the wheelsupported carriage frame providing a mobile base l whereby the rock drill rig may be readily moved piston 34 has a tubular piston rod 35 extending the front head 36 of the cylinder and is formed with a bore 31 containing a reciprocable inner piston 38. The piston 38 has its piston rod 39 extending forwardly through the forward end of the piston 34, in the manner shown in Fig. '7. Fixed at 40 within a bore 4I in the piston rod 39 is an annular member 42 engaging the transverse support 24 intermediate the arms 30, in the manner shown. Secured by U-bolts 43 to one of the vertical side plates 23 is a pump cylinder 44 having a vertical bore 45 containing a reciprocable pump plunger 46. This pump plunger has its piston rod 41 pivotally connected at 48 to a manual operating lever 49, the latter in turn being pivotally connected through links 5l) to the top of the transverse end frame 6 of the carriage. Formed within this transverse end frame is a tank 5I adapted to contain a liquid. The lower end of the pump cylinder, beneath the pump plunger, is connected through a conduit 52 to a valve box 53, this conduit communicating with a passage 54 in the valve box which is connected through a check-valve-controlled passage 55 and conduit 56 to the tank 5I. yThe passage 54 is also connected through a check-valve-co'ntrolled passage 51 and conduit 58 to a passage 59 (see Fig. 7) communicating with the rear end of the bore of the cylinder 33 at the rear side of the piston. 34. Liquid forwardly through cylinder, while flow through the passage 51 past the check valve is towards the cylinder 33. The conduit 58 is connected through a conduit 60 to the tank 5I and is provided with a manually opand their cooperating pistons, as above mentioned, provide a double telescopic hydraulic jack, and when the pump plunger is operated 4by the flow is permitted by the check valve through the passage 55 to the pump The hydraulic cylinders over the ground surface. When it is desired to drill horizontal or substantially horizontal holes in the working face, the drill rig may be positioned in the manner shown in Fig. 10, with the boom I4 swung upwardly to support the drilling tool I5 in a relatively high drilling position, as indicated in full lines in Fig. l0. The boom I4 may be swung in a vertical direction about its pivotal mounting simply by operating the hand pump to operate the hydraulic jack to effect upward swinging of the boom, and the boom may be quickly lowered simply by opening the by-pass valve 62. When it is desired to drill vertical holes in the floor, the drill guide frame I6 may be swung relative to the boom into the vertical position indicated in dotted lines in Fig. l0, in an obvious manner. When a horizontal hole is desired to be drilled in the working face near the ground surface, the boom may be swung downwardly into the position shown in Fig. 11, with the drill guiding frame disposed between the side frame members of the carriage near the ground surface as indicated. It is evident that during adjustment of the boom, the clamping bolt 28 is loosened and thereafter tightened to clamp the parts in adjusted position, and similar clamping bolts disposed at the boom pivot and the point of pivotal connection of the arms 30 with the boom may be tightened to hold the boom firmly in its adjusted position. By adjusting the clamps for the swivel plate and -saddle mounting, the guide frame I6 of the drilling tool may be adjusted into various positions with respect to the boom, so that holes may be drilled in practically `any desired location, in an obvious manner.

As a resultl of this invention, it will be noted that animproved rock drill rig is provided having improved supporting and adjusting means for the drilling tool whereby the latter may be expeditiously adjusted. It will further be evident that by the provision of the improved fluid actuated means for swinging the boom upwardly about its' pivot, the drilling tool may be easily adjusted into the desired drilling position, and by the provision of the by-pass means, the boom may be quickly lowered. YIt will further be evi, dent that by the provision of a rock drill rig having the novel combinations and arrangements of parts described, the drill rig is not only made simple in design and light in weight but is also extremely rugged in construction. Other uses and advantages of the improved rock drill rig will be clearly apparent to those skilled in the ar wnue there. is in this application specifically form of the same is shown for purposes of illustration and that the invention may bemodiiied and embodied in various other4 forms .without departing from its spirit or the scope of the appended claims.

What we claim as new and desire to -secure by Letters Patent is:

- i. A' rock drill i'ig comprising, in combination, a wheel-supported carriage, a boom pivotally mounted on said carriage to swing in a vertical direction relativethereto, said boom adapted to support a drilling tool, and iiuid actuated means for swinging said boom about its Divot comprising a iiuid actuated jack mounted on said carriage, a member guided on said carriage to move longitudinally relative thereto and operatively connected to said boom, said jack beingoperatively connected to said guided member for actuating the latter, and a pump mounted on said carriage for supplying iluid under pressure to said jack.

2. A rock drill rig comprising, yin combination,

a wheel-supported carriage, a boom pivotally.

mounted on said carriage to swing in a vertical direction relative thereto, said boom adapted to -support a drilling tool, and uid actuated means for swinging said boom about its pivotcomprising a iluid actuated jack mounted on said carriage, a member guided on said carriage to move longitudinally relative thereto, an arm secured dinal guideways on said carriage, a transverse member guided i'or movement along said guideways, an arm connection between ysaid transverse member and said boom, a hydraulic jack mounted on said carriage and operatively connected to said transverse member, and a manually operated pump mounted on said carriage for lsupplying llquidunderpressu're to said jack to effect movement of said transverse member along said guideways, thereby to eilect swinging of said boom about its-pivot.

6. A rock drill rig comprising, in combination,

\ a wheel-supported carriage, a bo'om pivotally mounted on said carriage at one end of the latter to swing in a vertical direction relative thereto and overlying said carriage with its free end disposed near the opposite end of said carriage, said boom adapted to support at its free end a drillto said guided member and operatively connected nected to said guided member for moving the latter along its` guideways, and a pump mounted on said carriage for s upplylng iiuid. under pressure to said jack.

w3. A rock drill rig comprising, in combination,

awheel-supported carriage, a -boom pivotally mounted on said carriage to swing in a vertical direction relative thereto, said boom adapted to support a drilling tool, and iiuid actuated means for swinging said boom about its pivot comprising a uidactuated jack mounted on said carriage, a member guided on said carriage to move longitudinally relative thereto and operatively connected to said boom, said jack being operatively connected to said guided member for movin g the latter along its guidewaysl a pump mounted on said carriage for supplying fluid under pressure to saidA jack, and'manually operable valve means iir by-passing thel iiuid from said Jack independently of said pump for yquickly lowering said boom.

'to' said boom, said jack being operatively. conf ing tool, and means for swinging said boom about its pivot comprising a crosshead member guided for movement longitudinally relative Ato said carriage and operatively connected to said boom. and an extensible power device mounted on said carriage for moving said crosshead along its guideways.

7. A rock drill rig comprising, in combination, a carriage, a boom pivotally mounted on said carlriage and adapted to support a drilling tool, and

means for swinging said boom about its pivot comprising a hydraulic jack operatively connected to said boom, and a manually operable pump mounted on said carriage for supplying vliquid under pressure to said jack.

8. A rock drill rig comprising, in combination,

a carriage, a boomvpivotally mounted onA said carriage and adapted to support a drilling tool, and means ,for swinging said boom about its pivot comprising a hydraulic Jack operatively connected to said boom, a manually operable pump mounted on said carriage for supplying liqlnd under pressure to'said jack, and a manually operated by-pass for effecting rapid lowering of said v boom independently of said pump.

9. A rock drill rig comprising, in combination, a carriage, a boom pivotally mounted on said carriage at one end of the latter with its free end disposed near the opposite end of said carriage,

Y said boom adapted to' support at its free end a 4. A rock drill rig comprising, in combination,

a wheel-supported carriage, a boom pivotally Vmounted on said carriage at one end of the latterto`svv'ing ina vertical direction relative thereto and overlying said carriage with its free end disposed near the oppositeend of said carriage, said boom adapted to support at its free enda drilling tool, means providing longitudinal guideways on said carriage beneath said boom, a transverse member guided for movement along said guideways, an arm connectionbetween said transverse member and said boom, and an extensible power device extending longitudinally of said carriage and operatively connected to said transverse member to move the latter along said guideways, thereby to effect swinging .of said boom about its pivot.

5. A rock drill rig comprising, in combination,

a wheel-supported carriage, a boom Vpivotally moutedon said carriage to swing in a vertical direction relative thereto, said boom adapted tov drilling tool, a crosshead guided on said carriage beneath said boom and operatively connected to saidbmfanrextensible power device on said carriage for moving said crosshead along. its

' guideways, and a clamping device associated with said crosshead for clamping the latter against.l

movement'A along its guideways.

10. A rock drill rig comprising, in combination, a wheel-supported carriage, a boom pivotally mounted on said carriage at one end thereof and extending longitudinally over the top of said carsupport at its free end a drilling tool, and means riage, the free end of said boom being disposed near the-opposite end of said carriage remote from the boompivot, said boom being adapted to for swinging said boom in a vertical direction about its pivot relative to said carriage including a member guided on said carriage beneath said boom for movement longitudinally with respect to said carriage and disposed on said carriage nearer to the end thereof to which said boom is support a drilling tool, means providinglongitupivoted than to the opposite end thereof,an arm pivotally connecting said guided member to said boom nearer to the free end of the latter than to the pivoted end thereof, and extensible adjusting means extending longitudinally-o1' saidcarriage beneath said boom foi` moving said-guided member along its guideway relative to said carriage to eiect actuation of said arm.

11. A rock drill rig comprising, in combination, a wheel-supported carriage, a boom overlying said carriage and pivotally mounted thereon to swing in a vertical direction relative thereto, said boom adapted to support a' drilling tool, and power operated means for swinging said boom about its adapted to support at its free end a drilling tool,4

an arm having at one end a movable pivotal connection with said carriage at a point spaced longitudinally of the carriage with respect to the boom pivot axis and pivotally connected to said boom at a point between said point of movable pivotal connection with said carriage and the' free end of said boom, an extensible jack device extending lengthwise of said carriage for moving said point of pivotal connection of said arm with said carriage longitudinally relative to said carriage to actuate said arm to effect swinging of .said boom about its pivot, and means on said car- -riage for energizing said jack device.

13. A rock drill rig comprising, in combination, a wheel-supported carriage having spaced side `frame members providing an open end, a boom overlying said carriage and pivotally mounted thereon to swing ina vertical direction relative thereto, said boom adapted to support a drilling tool and swingable about its pivot between the side members of said carriage through said open end to position the drilling tool below the top of said carriage, an extensible jack device mounted on said carriage and extending lengthwise thereof and operatively connected to said boom for swinging the latter, and means on said carriage for energizing said Jack device.

14. A rock drilling rig comprising, in combination, a carriage, a boom pivotally mounted on said carriage at one end of the latter and disposed with its free end near the opposite end of said carriage, said boom y adapted to support at its free .end a drilling tool, a member guided on said carriage beneath said boom for movement longitudinally with respect to said carriage, an arm connecting said member to said' boom, means for moving said member longitudinally relative to said carriage, and a clamping device associated with said member for clamping the latter against movement with respect to said carriage to lock said boom in adjusted position.

15. A rock drill rig comprising, in combination, a carriage, a boom pivotally mounted on said carriage and adapted to support a drilling tool, a crosshead guided on said carriage and operatively connected to said boom, a hydraulic jack on said carriage for moving said crosshead along its guideways, and a clamping device associated with said crosshead for clamping the latter against movement along its guideways to lock said boom in its adjusted position.

JOHN C. CURTIS. ELMER G. GARTIN. 

